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Gold/Mining/Energy : Global Platinum & Gold (GPGI)

GPGI 23.57

-2.9%

Jan 30 9:30 AM EST

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To: Bob Walsh who wrote (1833)	2/24/1997 5:36:00 PM
From: J.E.Currie	of 14226

Bob, ORO GRANDE AND WEAVER CREEK Arizona, USA GEOLOGICAL OBSERVATIONS and PRELIMINARY ASSESSMENT of PLATINUM AND GOLD POTENTIAL Report prepared for INCO LIMITED by Fischer Geological Consulting Associates Ltd January 1991 Peter Fischer, PHD I will try and highlight this 1" thick report Oro Grande history- The Oro Grande was discovered in the 1870's and has been intermittenly worked until the 1940's Around 1900 it was one of the richest Gold Mines in the Black Rock District. In 1904 the mine is reported to have produced 8600 ton of ore averaging 0.27 opt Au. Bullion shipped from Oro Grande was penalized by the mint in California for its Pt and Ag content. The owners had to sign a waiver for the Pt content of the ore. PREVIOUS GEOLOGICAL WORK Consistancy of some PGE metal ratios of Global's strongly scattered assay results strongly suggest NATURAL SAMPLES and NOT manipulation of homogeneity. REGIONAL GEOLOGIC FRAMEWORK The area of the Oro Grande property is situated on one of the major lineament zones of the North American Continent. The Oro Grand is located in a small Precambrian window (horst?) 24 samples were analyzed by INCO. MINERALIZATION General-Mineralization at Oro Grande consists of historically established and visible gold mineralization, highly anomalous platinum values in breccia ore and adjacent mafic-ultramafic rocks. GENETIC MODEL Based on the above data base (chart omitted by J.C. for brevity) the following is proposed for the Oro Grande Au-Pt mineralization: A Precambrian metamorphic, mafic assemblage was intruded by a mafic- minor ultramafic complex. This complex is assumed to have differentiated at depth into mafic and ultramafic phases. PGE are assumed to have pre-concentrated at depth in the ultamafics. The complex is thought to have a 2- or 3-stage igneous history overprinted by high grade metamorphism that might include plastic deformation by rolling. The location of the property on the Texas linament, one of the major crustal breaks of the continent, increases the liklihood of an assumed major ultramafic source at depth. Prolonged upward flow of hydrothermal solutions from the pluton transported metals to form the Au-Ag deposit and also is thought to have leached PGE from PGE-enriched ultramafics at depth and deposited them, together with Au, in the highly fractured breccdia zones and its adjacent faulted, mafic-ultramafic host rocks. IN CONCLUSION: The Oro Grande property is a Pt-Au occurance in a previously unrecognized and favorable setting. It has unquestionably highly anomalous Pt. values and very favorable Pt/Pd ratios in several rock types in s brecciated, hydrothermally altered, mafic complex whis is presumed to be underlain by a younger pluton. The property deserves serious attention. I did not spell check (G). Jim

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